Unit 7, Day 3

Homework Quiz (6)•Open Note (stamp)

▫Autotrophs (all types)

▫Heterotrophs (all types)

▫Food Chains

▫Food Webs

▫Producers and Consumers (all trophic levels)

▫Energy, Biomass, and Numbers Pyramids

Agenda (1)• Homework Quiz• Agenda• Homework Debrief• Learning Goal• String Activity• Activity Analysis• Pyramid Activity• Island Application

(Research)• Homework

Homework Debrief (6)•Autotrophs (all types)•Heterotrophs (all types)•Food Chains•Food Webs•Producers and Consumers (all trophic

levels)•Energy, Biomass, and Numbers Pyramids

Learning Goal (1)

•Objective 2.5.F (Energy Models) – I can

describe how energy flows through an

ecosystem and I can model this with food

chains, food webs, and ecological

pyramids.

String Activity (15)•If possible, find the person with the same

word•Together, hypothesize if/who you consume

AND if/who consumes you▫There may be multiple answers!

•Approach those other organisms. IFF they agree with your hypothesis, then place a string between you.▫Try to keep string untangled▫Please do not push through strings

Activity Analysis (10)• Based on what we as a class determined, work with

your table to draw a food web.

• Determine what each organism is: primary producer, primary consumer, secondary consumer, tertiary consumer, detritivore, or decomposer▫ It’s okay for you to be incorrect! Take a risk.

• Alligator Lizard, Bacteria, Cricket, Dead Animals, Dead Leaves, Earthworm, Fox, Fungus, Hawk, Maggots,Maple Tree Leaves, Millipede, Mushrooms, Pillbugs, Robin, Rotting Log, Sun

Activity Debrief (3)

Notes (4)•Detritivores CONSUME detritus

▫Detritus = dead plants/animals, feces

▫Millipedes, woodlice, dung flies, slugs, worms, sea stars, sea cucumbers, fiddler crabs

•Decomposers CAN’T EAT. They ABSORB & BREAK DOWN cells.▫Bacteria (dec. meat), fungi (dec. fruits/veggies)

Pyramid Activity (4)•On panel 1:

▫Ecological Pyramids Graphs of trophic structure

▫Trophic levels (feeding position) Primary producer = autotroph Primary consumer = herbivore Secondary/Tertiary consumer = omnivore/carnivore

Pyramid Activity (8)• Panel 2 • Pyramid of Energy

▫ Flow of energy

▫ Lose 90% of energy as heat Only 10% of energy

available for next trophic level

▫ Base has 100% of energy available

Pyramid Activity (8)• Panel 3 • Pyramid of Biomass

▫ Biomass per area

▫ Biomass = mass of each

individual x number of

individuals at each trophic

level

▫ g/m2

Pyramid Activity (8)• Panel 4

• Pyramid of Numbers

• # of individuals per area

• Large # of producers at

base

• Lower # of carnivores at

top

▫ (Usually)

Island Application (22 + 3 cleanup)• Must have primary producers, primary consumers,

secondary consumers, tertiary consumers, and decomposers.

• Must contain autotrophs, herbivores, omnivores, carnivores, and detritivores.

• Create a food web that contains at least 3 organisms at each trophic level + decomposers + detritivores

• Humans do not count!

Homework (1 min)•Due Wed 4/17 or Thu 4/18

▫YouTube Video: Biogeochemical Cycles▫Homework Quiz: Biogeochemical Cycles

•Homework quiz is open note•Suggestion: Draw each cycle!!!